The pairing of Federer and Djokovic adds a little spice to an event long on star power and light on any real stakes.

While world No. 1Rafael Nadaland No. 4Juan Martin del Potroare out with injuries, the Laver Cup has seven of the top 11 players in the ranking and 10 of the top 20.

Federer and his management team played a key role in the creation of the event, and the Swiss star helped lead Team Europe to the victory last year in Prague.

The inaugural edition also was marked by a splashy doubles pairing involving Federer, who teamed with Nadal for the first time for a 6-4, 1-6, 10-5 victory over Sock and fellow American Sam Querrey.

Asked about the matchup with Federer and Djokovic, Sock cracked: “Who’s that?”

Team Europe. (Photo by Stacy Revere/Getty Images for The Laver Cup)

“Yeah, obviously going to be a legendary team,” he continued “We got a little bit of it last year.”

Djokovic and Federer last played against each other in the Cincinnati final on Aug. 19, when Djokovic won 6-4, 6-4 to become the player to claim all nine ATP Masters 1000 events since the series started in 1990. Djokovic leads the all-time series with 24 victories.

“This is what this competition is all about, you know, bringing us all together,” Djokovic said.

How Djokovic and Federer do together remains to be seen. Sock is one of the world’s top doubles players, and the 32-year-old Anderson, who is from South Africa and played in college at the University of Illinois, is having a terrific year.

But the possibilities for the talented pairing sure looked pretty good.

“I think I will take the deuce side. If Novak is OK with that, I will be happy to play on the deuce side,” Federer said when asked where each player might set up.